Instead of considering pipe breaks and criticality as separate aspects in an additive manner, some users prefer to consider the product of likelihood (pipe break) and consequences (criticality) as a single aspect called risk. This can be done by including Hydraulic Risk as an aspect either in addition to or in place of the pipe break and consequences aspects as long as the weighting adds to one.

The pipe risk score is calculated as

Hydraulic Risk Score = Pipe Break Score x Criticality Score/100

Hydraulic risk is handled like any other aspect except that it doesn't have a scenario associated with it as the scenarios are associated with the pipe break and criticality scores.